<!DOCTYPE html>
<html lang="cn">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        function order(item) {
            return new Promise(resolve => {
                setTimeout(function () {
                    resolve(item);
                }, 1000)
            })
        }
       async function process(array) {
            for (let i = 0; i < array.length; i++) {
                let res=await order(array[i]);
                console.log(res)
            }
            
            console.log('ok')
        }
        process([1,2,3])
    </script>
</body>

</html>